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MINING PLAN <br />Subsoil and overburden will be stripped and saved separate from the topsoil. <br />• <br />• <br />Mixing of these two materials would not be desirable and could cause a degradation <br />of the soil. Furthermore, replacement of subsoil and overburden will serve the <br />purpose of not only supplying a base for the topsoil and a crude form of <br />restructuring the original soil, but will also allow filling various small <br />irregularities in the final surface. As a result this material will largely be <br />used to create the final grade on the surface. <br />51bT~Ei ~ I~'ASL?RFS: ESctending from between the various gravel outcrops are <br />many valleys of various dimensions. In the smaller valleys on the north end of <br />the operation, erosional damages are highly localized and well controlled by the <br />presence of the Skunkbush Sumac. In the southern portions of the site and in some <br />of the easterly facing valleys, the erosional problems are considerably more <br />severe. As a rule the shrub cover is slight and the exposure of Pierre Shale <br />becomes far more of a problem than is the case in the northern portions of the . <br />site. This means that in all but a few of the water courses, the control of run- <br />off to limit erosion and sedimentation on adjacent lands will be required. <br />In some places, control measures are already in place in the form of <br />stockponds and small dams that periodically capture run-off. However, with a <br />gravel operation on the hills, the run-off problems could become considerably more <br />severe. <br />The first measure to be implemented, is to control as much run-off as <br />possible in the pit operations themselves. Operating west to east in most of the <br />phases will help to establish and maintain a barrier on the "downhill" side of the <br />operation. This will capture at least some of the run-off from the operation <br />before it leaves the pit area. In some instances, control from within the pit is <br />• page 6 of 10 Exhibit D <br />